<template>
  <div>
    <!-- 搜索栏 ： 两个搜索框  搜索按钮  添加商家按钮  批量删除   -->
	<el-row>
	  <el-col :span="2"></el-col>
	  <el-col :span="5">
		   <el-input placeholder="请输入名称搜索" v-model="query.businessName"/>
	  </el-col>
	  <el-col :span="5">
	  		<el-input placeholder="请输入地址搜索" v-model="query.businessAddress"/>
	  </el-col>
	  <el-col :span="2">
	  		<el-button type="primary" plain @click="getByPage">搜索</el-button>
	  </el-col>
	  <el-col :span="3">
	  		<el-button type="success" plain @click="showDialog">新增商家</el-button>
	  </el-col>
	  <el-col :span="3">
	  		<el-button type="danger" plain @click="handleBatchDel">批量删除</el-button>
	  </el-col>
	  
    </el-row>
	<!-- 表格 -->
	<el-row>
	  <el-col :span="2"></el-col>
	  <el-col :span="20">
		  
		<el-table :data="pb.data" 
		          stripe 
				  border
				  @selection-change="handleSelectionChange">
		  <el-table-column type="selection"  width="55" />
		  <el-table-column prop="businessAccount" label="商家账号" width="100px" show-overflow-tooltip/>
		  <el-table-column prop="businessName" label="商家名称" width="120px"/>
		  <el-table-column prop="businessAddress" label="商家地址" width="120px" show-overflow-tooltip/>
		  <el-table-column prop="businessExplain" label="商家简介" width="120px" show-overflow-tooltip/>
		  <el-table-column label="主图">
			  <template #default="scope">
				  <el-image style="width: 50px" :src="scope.row.businessImg" fit="contain" />
			  </template>
		  </el-table-column>
		  <el-table-column label="起送价">
			  <template #default="scope">
				  ￥{{scope.row.startPrice}}
			  </template>
		  </el-table-column>
		  <el-table-column label="配送费">
			  <template #default="scope">
				  ￥{{scope.row.deliveryPrice}}
			  </template>
		  </el-table-column>
		  <el-table-column label="操作" width="200px">
		        <template #default="scope">
		          <el-button size="small" @click="handleEdit(scope.row.businessId)">
		            编辑
		          </el-button>
		          <el-button
		            size="small"
		            type="danger"
		            @click="handleDelete(scope.row.businessId)"
		          >
		            删除
		          </el-button>
		        </template>
		      </el-table-column>
		</el-table>
		  
	  </el-col>
	  
	</el-row>  
	<!-- 分页组件 -->
	<el-row>
	  <el-col :span="6"></el-col>
	  <el-col :span="12">
		   <el-pagination
		        v-model:current-page="query.pageNow"
		        v-model:page-size="query.pageCount"
		        :page-sizes="[5, 8, 10, 20]"
		        layout="total, sizes, prev, pager, next, jumper"
		        :total="pb.totalRows"
		        @size-change="getByPage"
		        @current-change="getByPage"
		      />
	  </el-col>
	  
	</el-row>  
	
	<!-- 编辑商家信息的对话框  用于添加和修改 -->
	<el-dialog v-model="dialogFormVisible" title="编辑商家信息" width="500">
		<el-form :model="form">
		  <el-form-item label="商家账号" :label-width="formLabelWidth">
			<el-input v-model.trim="form.businessAccount" autocomplete="off" readonly/>
		  </el-form-item>
		  <el-form-item label="商家名称" :label-width="formLabelWidth">
			  <el-input v-model.trim="form.businessName" autocomplete="off" />
		  </el-form-item>
		  <el-form-item label="商家地址" :label-width="formLabelWidth">
		  	  <el-input v-model.trim="form.businessAddress" autocomplete="off" />
		  </el-form-item>
		  <el-form-item label="商家简介" :label-width="formLabelWidth">
		  	  <el-input v-model.trim="form.businessExplain" autocomplete="off" />
		  </el-form-item>
		  <el-form-item label="主图上传" :label-width="formLabelWidth">
			  <el-upload
				  class="avatar-uploader"
				  action="http://localhost:8080/upload"
				  :show-file-list="false"
				  :on-success="handleAvatarSuccess"
				  :before-upload="beforeAvatarUpload"
				  name="myFile"
				>
			  <img v-if="imageUrl" :src="imageUrl" class="avatar" />
			  <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
		    </el-upload>
		  </el-form-item>
		  <el-form-item label="起送价" :label-width="formLabelWidth">
		  	  <el-input-number v-model="form.startPrice" :min="5"/>
		  </el-form-item>
		  <el-form-item label="配送费" :label-width="formLabelWidth">
		  	  <el-input-number v-model="form.deliveryPrice" :min="5"/>
		  </el-form-item>
		  <el-form-item label="备注" :label-width="formLabelWidth">
		  	  <el-input v-model.trim="form.remarks" autocomplete="off" />
		  </el-form-item>
		</el-form>
		<template #footer>
		  <div class="dialog-footer">
			<el-button @click="dialogFormVisible = false">取消</el-button>
			<el-button type="primary" @click="addOrUpdate">
			  确认提交
			</el-button>
		  </div>
		</template>
  </el-dialog>
	
  </div>
</template>

<script setup>
import { onMounted, ref, getCurrentInstance } from 'vue';
import { ElMessage,ElMessageBox } from 'element-plus';
import { nanoid } from 'nanoid';
import { Plus } from '@element-plus/icons-vue'

  let {proxy} = getCurrentInstance();

  //对话框是否显示
  let dialogFormVisible = ref(false);
  let formLabelWidth = ref('100px');
  
  //表单数据 添加和修改
  let form = ref({
	  businessAccount: '',
	  businessName: '',
	  businessAddress: '',
	  businessImg: '',
	  businessExplain: '',
	  startPrice: 0.0,
	  deliveryPrice: 0.0,
	  remarks: ''
  })
  
  //生成商家账号的函数
  const generateAccount = ()=>{
	  let account = nanoid().replaceAll("_","").replaceAll("-","");
	  console.log(account);
	  let startIndex = Math.floor(Math.random()*10);
	  account = account.substring(startIndex,startIndex+9);
	  console.log(account);
	  return account;
  }
  
  //点新增商家信息按钮弹出对话框
  const showDialog = ()=>{
	  
	  dialogFormVisible.value = true;
	  //数据清除
	  form.value = {
		  businessAccount: generateAccount(),
		  businessName: '',
		  businessAddress: '',
		  businessExplain: '',
		  businessImg: '',
		  startPrice: 0.0,
		  deliveryPrice: 0.0,
		  remarks: ''
	  };
	  //清空之前上传的图片的回显链接
	  imageUrl.value = '';
  }

  //分页+搜索条件
  let query = ref({
	  pageNow: 1,
	  pageCount: 5,
	  businessName: '',
	  businessAddress: ''
  })
  
  //分页对象 totalRows  totalPages  data(集合)
  let pb = ref({
	  totalRows: 0,
	  totalPages: 0,
	  data: []
  })

  const getByPage = ()=>{
	  proxy.$axios({
		  method: 'post',
		  url: '/business/page',
		  data: query.value
	  }).then(res=>{
		  console.log(res);
		  let resultBean = res.data;
		  if(resultBean.code==200){
			let pageBean = resultBean.data; 
			pb.value = pageBean;// totalRows  totalPages  data(集合)
		  }else{
			  ElMessage.error(resultBean.msg);
		  }
	  })
  }
  
  //添加或修改
  const addOrUpdate = ()=>{
	  proxy.$axios({
		  method: 'post',
		  url: '/business',
		  data: form.value
	  }).then(res=>{
		  let resultBean = res.data;
		  if(resultBean.code == 200){
			  getByPage();
			  dialogFormVisible.value = false;
			  ElMessage.success('保存商家信息成功');
		  }else{
			  ElMessage.error(resultBean.msg);
		  }
	  })
  }
  
  //处理数据回显
  const handleEdit = (businessId)=>{
	  console.log('回显：businessId----',businessId);
	  //根据id查询对应的实体数据
	  proxy.$axios({
		  method: 'get',
		  url: '/business/'+businessId
	  }).then(res=>{
		  let resultBean = res.data;
		  if(resultBean.code == 200){
			  form.value = resultBean.data;
			  imageUrl.value = resultBean.data.businessImg; //回显之前的图片
			  dialogFormVisible.value = true;
		  }else{
			  ElMessage.error(resultBean.msg);
		  }
	  })
  }
  
  //处理删除
  const handleDelete = (businessId)=>{
	  console.log('删除：businessId----',businessId);
	  ElMessageBox.confirm(
	      '您确定要删除该商家信息吗？',
	      '删除提示',
	      {
	        confirmButtonText: '确定',
	        cancelButtonText: '取消',
	        type: 'warning',
	      }
	    )
	      .then(() => {
			  
			  //确定删除
			  proxy.$axios({
				  method: 'delete',
				  url: '/business/'+businessId
			  }).then(res=>{
				  let resultBean = res.data;
				  if(resultBean.code == 200){
					  ElMessage.success('删除成功');
					  getByPage();
				  }else{
					  ElMessage.error(resultBean.msg);
				  }
			  })
			  
	      })
	      .catch(() => {
	           ElMessage.info('取消删除');
	      })
  }
  
  // const selectable = (row,index)=>{
	 //  console.log('selectable',row,index);
	 //  return true;
  // }
  
  //选中项的id集合
  let selectOptions = ref([]);
  
  //表格中多选框选中或取消时会触发  也就是选中项变化
  const handleSelectionChange = (newSelection)=>{
	  console.log('选中项改变',newSelection);
	  selectOptions.value = []; //清空
	  newSelection.forEach((selOp)=>{
		  console.log(selOp.businessId);
		  selectOptions.value.push(selOp.businessId);
	  });
  }
  
  //批量删除的函数
  const handleBatchDel = ()=>{
	  console.log(selectOptions.value);
	  if(selectOptions.value.length==0){
		  ElMessage.info('请选中至少一条记录之后再进行删除');  
		  return;
	  }
	  
	  ElMessageBox.confirm(
	      '您确定要删除选中的商家信息吗？',
	      '删除提示',
	      {
	        confirmButtonText: '确定',
	        cancelButtonText: '取消',
	        type: 'warning',
	      }
	    )
	      .then(() => {

			console.log(selectOptions.value);
			console.log(typeof(selectOptions.value));
			console.log(JSON.stringify(selectOptions.value));

			let str = JSON.stringify(selectOptions.value);
			str = str.substring(1,str.length-1);
	  			  
	  			  //确定删除
				proxy.$axios({
					method: 'post',
					url: '/business/batch/'+str,
				}).then(res=>{
					let resultBean = res.data;
					if(resultBean.code == 200){
						ElMessage.success('删除成功');  
						getByPage();
					}else{
						ElMessage.error(resultBean.msg);
					}
				})
	  			
	  			  
	      })
	      .catch(() => {
	           ElMessage.info('取消删除');
	      })
  }
  
  //上传图片的回显链接
  let imageUrl = ref('');
  
  //上传成功之后的回调
  const handleAvatarSuccess = (response,uploadFile)=>{
	  ElMessage.success('上传成功');
	  console.log('上传成功，',response,uploadFile);
	  //负责上传完成 图片回显
	  imageUrl.value = response.data;
	  //将上传成功的链接放入form表单， 添加或修改时会携带到服务端
	  form.value.businessImg = response.data;
  }
  
  //上传之前预检文件
  const beforeAvatarUpload = (rawFile)=>{
	  //文件类型不符合要求 或者 文件大小超过要求  都不能上传
	  if (rawFile.type !== 'image/jpeg' && rawFile.type !== 'image/png') {
	      ElMessage.error('Avatar picture must be JPG format!')
	      return false
	    } else if (rawFile.size / 1024 / 1024 > 5) {
	      ElMessage.error('Avatar picture size can not exceed 5MB!')
	      return false
	    }
		//可以上传
	    return true
  }
  
  onMounted(()=>{
	  getByPage();
  })


</script>

<style scoped>
	.avatar-uploader .avatar {
	  width: 100px;
	  height: 100px;
	  display: block;
	}
</style>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 100px;
  height: 100px;
  text-align: center;
}
</style>